Loss Element
Loss Element component
The Loss Element component models losses using velocity-dependent efficiency.
Kinematic Equation
Where and are the absolute rotation angles of and , respectively and is the fixed rotation angles of with respect to
Also and are defined as:
, ∈
Torque Balance Equation (No Inertia)
Where and are the torques applied to and , respectively.
Also
is the loss torque and is defined as:
Where
=
Power Loss:
When the gear is non-ideal (ideal = false ), the power loss () is calculated as:
Connections
Name
|
Condition
|
Description
|
ID
|
|
-
|
Flange to driver shaft
|
flange_a
|
|
-
|
Flange to driven shaft
|
flange_b
|
support
|
|
Conditional Support Flange
|
Support
|
|
|
Conditional real output port for power loss
|
lossPower
|
|
|
Parameters
Symbol
|
Condition
|
Default
|
Units
|
Description
|
ID
|
|
-
|
|
-
|
Defines whether the component is:
true - ideal or
false - non-ideal
|
ideal
|
|
-
|
|
|
Defines fixed rotation of with respect to
|
deltaPhi
|
data source
|
|
GUI
|
-
|
Defines the source for the loss data:
•
|
by an attachment [attachment]
|
•
|
by an external file [file]
|
|
datasourcemode
|
Use support
|
-
|
|
-
|
Enables/disables the support flange
|
useSupport
|
|
data source = GUI
|
|
|
Defines velocity dependent efficiency
The columns are:
[ ( ( ) ( )]
Five options are available:
•
|
1 by 1 array: entered value is taken as the constant efficiency for forward and backward cases
|
( ) = ( ) =
•
|
1 by 2 array: first entered value is taken as the constant efficiency for forward case and the second for backward cases
|
( ) = ( ) =
•
|
1 by 3 array: first column is ignored and the second and third values are taken as constant efficiencies for forward and backward cases, respectively
|
•
|
n by 2 array: 2nd column is efficiency
|
( ) = ( ) = ( )
2nd column is forward efficiency
( )
3rd column is backward efficiency
( )
Note: The rows of the array are ordered according to , with the first row having the smallest ||
|
lossTable
|
data source = attachment
|
-
|
Defines velocity dependent efficiency
First column is angular velocity ( )
(See below)
|
data
|
data source = file
|
-
|
fileName
|
|
data source = attachment or file
|
|
-
|
Defines the corresponding data columns used for forward efficiency () and backward efficiency ( )
Two options are available:
Data column corresponding to the column number is used for both forward and backward efficiency
Data column corresponding to the first column number is used for forward efficiency (
and data column corresponding to the second column number is used for backward efficiency (
|
columns
|
smoothness
|
|
Table points are linearly interpolated
|
-
|
Defines the smoothness of table interpolation. There are two options:
•
|
Table points are linearly interpolated
|
•
|
Table points are interpolated such that the first derivative is continuous
|
|
smoothness
|
|
|
See Also
Driveline Library Overview
MapleSim Library Overview
1-D Mechanical Overview
Loss Elements
|